NCERT Exemplar II — task. Science CBSE, Class 10.

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1. A circular loop placed in a plane perpendicular to the plane of paper carries a current when the key is ON. The current as seen from points A and B (in the plane of paper and on the axis of the coil) is anti-clockwiseand clockwise respectively. The magnetic field lines point from B to A. The N-pole of the resultant magnet is on the face close to

A
B
A if the current is small, and B if the current is large
B if the current is small and A if the current is large

2. For a current in a long straight solenoid N-and S-poles are created at the two ends. Among the following statements, the incorrect statement is

(a) The field lines inside the solenoid are in the form of straight lines which indicates that the magnetic field is the same at all points inside the solenoid
(b) The strong magnetic field produced inside the solenoid can be used to magnetise a piece ofmagnetic material like soft iron, when placed inside the coil
(c) The pattern of the magnetic field associated with the solenoid is different from the pattern of the magnetic field around a bar magnet
(d) The N-and S-poles exchange position when the direction of current through the solenoid is reversed

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38. NCERT Exemplar II

Exercise condition: